Compare calculators
Both calculators run independently — change the inputs on either side to compare results.
Cycling
Bike Gear Ratio Calculator
Calculates gear inches — a measure of how far the bike travels per pedal stroke — from chainring, cassette, and wheel diameter. Useful for comparing gear ratios across drivetrains, planning gear upgrades, and matching cadence to terrain.
Fill in the required fields to see your result.
Cycling
Bike Chain Length Calculator
Determine the correct number of chain links for your bike's drivetrain using chainstay length and sprocket sizes. Essential when installing a new chain or changing gearing.
Fill in the required fields to see your result.
Key differences
| Bike Gear Ratio Calculator | Bike Chain Length Calculator | |
|---|---|---|
| Category | Cycling | Cycling |
| Inputs required | 3 | 3 |
| Result | Gear Inches (inches) | Chain Length (links) |
| What it does | Calculates gear inches — a measure of how far the bike travels per pedal stroke — from chainring, cassette, and wheel diameter. Useful for comparing gear ratios across drivetrains, planning gear upgrades, and matching cadence to terrain. | Determine the correct number of chain links for your bike's drivetrain using chainstay length and sprocket sizes. Essential when installing a new chain or changing gearing. |